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From: | Adam Kessel |
Subject: | Unable to configure bridge networking on Ubuntu 21.04 host (Netplan) / MacOS guest |
Date: | Fri, 17 Sep 2021 20:00:24 -0400 |
User-agent: | Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 |
I've followed the various tutorials exactly, e.g. https://fabianlee.org/2019/04/01/kvm-creating-a-bridged-network-with-netplan-on-ubuntu-bionic/ , https://cplatform99.blogspot.com/2019/03/how-to-configure-linux-kvm-bridge-on.html , https://levelup.gitconnected.com/how-to-setup-bridge-networking-with-kvm-on-ubuntu-20-04-9c560b3e3991 , https://www.answertopia.com/ubuntu/creating-an-ubuntu-kvm-networked-bridge-interface/
I've tried setting both the Ethernet interface and the bridge interface to DHCP and with statically configured IP addresses. I've also tried a LAN-valid static IP address on the guest as well as DHCP. No combination of these settings gets me through to the network from the guest. I've tried going through the virt-manager GUI and also manually crafting qemu command-line switches. I've tried tun/tap as well as just connecting directly to br0. I've tried disabling my firewall. I do have IP Forwarding configured on the host.
My host has a very simple setup -- just one network card, IP address set by DHCP.
Can anyone point me to a dead-simple, failproof/foolproof method for enabling bridge networking with this setup? Is there something that changed with Ubuntu 21.04 (either with networking or the latest qemu) such that these older tutorials aren't working? Any suggestions for how to troubleshoot?
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